December, 1799. Europe is recovering from the Age
or Reason, the Vatican is learning to live with Napoleon, and America is
celebrating a new era of independence. But in New York State, something is
spreading its own brand of madness through the streets. Secret societies are
crawling from the woodwork, and there's a Satanic conspiracy around every
corner.

Roz Forrester is stranded in a town where festive cheer and
random violence go hand-in-hand. Chris Cwej is trapped on board the TARDIS with
someone who's been trained to kill him. And when Reason itself breaks down,
even The Doctor can't be sure who or what he's fighting for.

Christmas
is coming to town, and the end of civilization is following close behind...